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Open AccessArticle

Effect of Thoracic Gas Volume Changes on Body Composition Assessed by Air Displacement Plethysmography after Rapid Weight Loss and Regain in Elite Collegiate Wrestlers

1
Japan Institute of Sports Sciences, 3-15-1, Nishigaoka, Kita-ku, Tokyo 115-0056, Japan
2
Department Faculty of Sports and Health Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan
3
Section of Healthy Longevity Research, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8636, Japan
4
Department of Sports Wellness Sciences, Japan Women’s College of Physical Education, Tokyo 157-0061, Japan
5
Japan Society for the Promotion of Science, Kojimahi Business Center Building, 5-3-1, Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
6
Graduate School of Sport Sciences, Osaka University of Health and Sport Sciences, Osaka 590-0496, Japan
*
Author to whom correspondence should be addressed.
Sports 2019, 7(2), 48; https://doi.org/10.3390/sports7020048
Received: 13 January 2019 / Revised: 10 February 2019 / Accepted: 15 February 2019 / Published: 19 February 2019
(This article belongs to the Special Issue Tackling Performance Challenges in Martial Arts and Combat Sports)
We investigated the effect of rapid weight loss (RWL) and weight regain (WR) on thoracic gas volume (VTG) and body composition assessment using air displacement plethysmography (ADP) in male wrestlers. Eight male elite collegiate wrestlers completed a RWL regimen (6% of body mass) over a 53-h period, which was followed by a 13-h WR period. ADP was used at three time points (baseline (T1), post-RWL (T2) and post-WR (T3)) according to the manufacturer’s testing recommendations. The total body water and bone mineral content were estimated using the stable isotope dilution method and dual energy X-ray absorptiometry, respectively, at the same time points. Body composition was assessed with two-component (2C) or four-component (4C) models using either the measured VTG (mVTG) or predicted VTG (pVTG). Measured VTG increased from T1 to T2 (0.36 ± 0.31 L, p < 0.05) and decreased from T2 to T3 (−0.29 ± 0.15 L, p < 0.01). However, the changes in fat mass and fat free mass, which were calculated by both 2C and 4C models, were not significantly different when compared between calculations using mVTG and those using pVTG. Our results indicate that VTG significantly changes during RWL and WR, but both measured and predicted VTG can be used to assess changes in body composition during RWL and WR. View Full-Text
Keywords: body composition; thoracic gas volume; rapid weight loss; weight regain; weight-categorized athletes body composition; thoracic gas volume; rapid weight loss; weight regain; weight-categorized athletes
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Kondo, E.; Shiose, K.; Yamada, Y.; Osawa, T.; Sagayama, H.; Motonaga, K.; Ouchi, S.; Kamei, A.; Nakajima, K.; Takahashi, H.; Okamura, K. Effect of Thoracic Gas Volume Changes on Body Composition Assessed by Air Displacement Plethysmography after Rapid Weight Loss and Regain in Elite Collegiate Wrestlers. Sports 2019, 7, 48.

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